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Define simple harmonic motion.

Simple harmonic motion is defined as a motion where the acceleration of the particle is proportional to but in the opposite direction to the displacement of the particle.
EE
Answered by Eemeli E. • Physics tutor
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A nail of mass 7.0g is held horizontally and is hit by a hammer of mass 0.25kg moving at 10ms^-1. The hammer remains in contact with the nail during and after the blow. (a) What is the velocity of the hammer and nail after contact?

The principle necessary to answer this question is the conservation of linear momentum. This means that the sum of the momentum of the hammer and nail before impact must be equal to the total momentum of the...
CS
Answered by Caroline S. • Physics tutor
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How does a capacitor work and how do I treat it in a circuit?

for a capacitor the equations you need to know are: Q=CV V=Vin*e^(t/RC) and E=1/2QV (with Q=charge/columbs, C= capacitance/Farads, V=voltage/volts, R=resitance/ohms, Vin=initial voltage when discharging/volt...
TM
Answered by Tom M. • Physics tutor
3399 Views

Trolley A carrying mass 10kg is moving at speed 5m/s, and collides with stationary Trolley B carrying a mass 5kg. Indicating which Law you would apply, what is the speed and direction of Trolley B if Trolley A's resulting movement is 2m/s to the left?

By the Law of Conservation of Momentum, I nitial Momentum=Final Momentum, in a closed system. Take movement to the right as + and to the left as - Therefore equate the two as such: Initial (A+B) = final (A+B...
PS
Answered by Parinita S. • Physics tutor
3677 Views

Describe the structure of an alpha particle

An alpha particle is made up of two neutrons and two protons. It is the same as the nucleus of a helium atom.
AM
Answered by Alexandra M. • Physics tutor
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